| 摘要 |
PURPOSE: A spindle device is provided to effectively improve a cooling effect by flowing a cooling fluid to the external cooling path of an external cooling jacket in order to discharge heat generated in a motor and thrust bearing. CONSTITUTION: A spindle part(10) comprises a front end part(111), a rear end part(112), and a middle end part arranged between the front end part and the rear end part. A housing(20) protects the spindle part. An external cooling jacket(30) comprises an external cooling path part(34) which allows the flow of the cooling fluid. A motor is arranged between the middle end parts rotates the spindle part. A front bearing(60) is arranged between the front end part and a first end part(31). |
